Remove superfluous NULL checks. Add Andy's BN_FLG comment.
[openssl.git] / crypto / rc5 / rc5_locl.h
1 /*
2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the OpenSSL license (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9
10 #include <stdlib.h>
11
12 #undef c2l
13 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
14                          l|=((unsigned long)(*((c)++)))<< 8L, \
15                          l|=((unsigned long)(*((c)++)))<<16L, \
16                          l|=((unsigned long)(*((c)++)))<<24L)
17
18 /* NOTE - c is not incremented as per c2l */
19 #undef c2ln
20 #define c2ln(c,l1,l2,n) { \
21                         c+=n; \
22                         l1=l2=0; \
23                         switch (n) { \
24                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
25                         /* fall thru */                               \
26                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
27                         /* fall thru */                               \
28                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
29                         /* fall thru */                               \
30                         case 5: l2|=((unsigned long)(*(--(c))));      \
31                         /* fall thru */                               \
32                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
33                         /* fall thru */                               \
34                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
35                         /* fall thru */                               \
36                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
37                         /* fall thru */                               \
38                         case 1: l1|=((unsigned long)(*(--(c))));      \
39                                 } \
40                         }
41
42 #undef l2c
43 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
44                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
45                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
46                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
47
48 /* NOTE - c is not incremented as per l2c */
49 #undef l2cn
50 #define l2cn(l1,l2,c,n) { \
51                         c+=n; \
52                         switch (n) { \
53                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
54                         /* fall thru */                                     \
55                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
56                         /* fall thru */                                     \
57                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
58                         /* fall thru */                                     \
59                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
60                         /* fall thru */                                     \
61                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
62                         /* fall thru */                                     \
63                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
64                         /* fall thru */                                     \
65                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
66                         /* fall thru */                                     \
67                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
68                                 } \
69                         }
70
71 /* NOTE - c is not incremented as per n2l */
72 #define n2ln(c,l1,l2,n) { \
73                         c+=n; \
74                         l1=l2=0; \
75                         switch (n) { \
76                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
77                         /* fall thru */                              \
78                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
79                         /* fall thru */                              \
80                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
81                         /* fall thru */                              \
82                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
83                         /* fall thru */                              \
84                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
85                         /* fall thru */                              \
86                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
87                         /* fall thru */                              \
88                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
89                         /* fall thru */                              \
90                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
91                                 } \
92                         }
93
94 /* NOTE - c is not incremented as per l2n */
95 #define l2nn(l1,l2,c,n) { \
96                         c+=n; \
97                         switch (n) { \
98                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
99                         /* fall thru */                                    \
100                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
101                         /* fall thru */                                    \
102                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
103                         /* fall thru */                                    \
104                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
105                         /* fall thru */                                    \
106                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
107                         /* fall thru */                                    \
108                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
109                         /* fall thru */                                    \
110                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
111                         /* fall thru */                                    \
112                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
113                                 } \
114                         }
115
116 #undef n2l
117 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
118                          l|=((unsigned long)(*((c)++)))<<16L, \
119                          l|=((unsigned long)(*((c)++)))<< 8L, \
120                          l|=((unsigned long)(*((c)++))))
121
122 #undef l2n
123 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
124                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
125                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
126                          *((c)++)=(unsigned char)(((l)     )&0xff))
127
128 #if (defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER))
129 # define ROTATE_l32(a,n)     _lrotl(a,n)
130 # define ROTATE_r32(a,n)     _lrotr(a,n)
131 #elif defined(__ICC)
132 # define ROTATE_l32(a,n)     _rotl(a,n)
133 # define ROTATE_r32(a,n)     _rotr(a,n)
134 #elif defined(__GNUC__) && __GNUC__>=2 && !defined(__STRICT_ANSI__) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC)
135 # if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
136 #  define ROTATE_l32(a,n)       ({ register unsigned int ret;   \
137                                         asm ("roll %%cl,%0"     \
138                                                 : "=r"(ret)     \
139                                                 : "c"(n),"0"((unsigned int)(a)) \
140                                                 : "cc");        \
141                                         ret;                    \
142                                 })
143 #  define ROTATE_r32(a,n)       ({ register unsigned int ret;   \
144                                         asm ("rorl %%cl,%0"     \
145                                                 : "=r"(ret)     \
146                                                 : "c"(n),"0"((unsigned int)(a)) \
147                                                 : "cc");        \
148                                         ret;                    \
149                                 })
150 # endif
151 #endif
152 #ifndef ROTATE_l32
153 # define ROTATE_l32(a,n)     (((a)<<(n&0x1f))|(((a)&0xffffffff)>>((32-n)&0x1f)))
154 #endif
155 #ifndef ROTATE_r32
156 # define ROTATE_r32(a,n)     (((a)<<((32-n)&0x1f))|(((a)&0xffffffff)>>(n&0x1f)))
157 #endif
158
159 #define RC5_32_MASK     0xffffffffL
160
161 #define RC5_16_P        0xB7E1
162 #define RC5_16_Q        0x9E37
163 #define RC5_32_P        0xB7E15163L
164 #define RC5_32_Q        0x9E3779B9L
165 #define RC5_64_P        0xB7E151628AED2A6BLL
166 #define RC5_64_Q        0x9E3779B97F4A7C15LL
167
168 #define E_RC5_32(a,b,s,n) \
169         a^=b; \
170         a=ROTATE_l32(a,b); \
171         a+=s[n]; \
172         a&=RC5_32_MASK; \
173         b^=a; \
174         b=ROTATE_l32(b,a); \
175         b+=s[n+1]; \
176         b&=RC5_32_MASK;
177
178 #define D_RC5_32(a,b,s,n) \
179         b-=s[n+1]; \
180         b&=RC5_32_MASK; \
181         b=ROTATE_r32(b,a); \
182         b^=a; \
183         a-=s[n]; \
184         a&=RC5_32_MASK; \
185         a=ROTATE_r32(a,b); \
186         a^=b;